Expansible pulley.



No. 88'?,=261. PATENTED NOV. 27, 1906.

G. s. 00X. EXPA-NSIBLB PULLBY.

APPLICATIGN FILED NOV. 2B. 1905.

THF Namvls E-rsRs ca.. WASHINGTON, v4 c.

UNITED STATES PATENT oEEIoE.

GEORGE S. COX` OF FITZWATERTOWN, PENNSYLVANIA, ASSIGNOR TO HIMSELF, ANDIVALTER S. COX, OF PHILADELPHIA, PENNSYLVANIA, TRADING AS GEORGE S. COXAND BROTHER.

EXF'ANSIBLE PULLEY.

Specification of Letters Patent.

Patented Nov. 2'7, 1906.

Original application filed .Tune 2l, 1905, Serial No. 266,228. Dividedand this application filed November 28, 1905. Serial No. 289,407.

To all whom. 'llt may concern:

Be it known that I, GEORGE S. Cox, a citi- Zen of the United States,residing at Fitzwatertown, county of Montgomery, and State ofPennsylvania, have invented a new and useful Improvement in ExpansiblePulleys, of which the following is a full, clear, and exact description,reference being had to the accom? panying drawings, which form a part ofthis specification.

The object of the invention is to provide a construction whereby thediameter of a pulley may be expanded or contracted.

This application is a division of an application heretofore filed by meJune 21, 1905, Serial No. 266,228, for patent for a drying or finishingmachine for textile fabrics.

In the drawings, Figure 1 is a transverse sectional view of a pulley,its shaft, and the means for expanding and contracting it. 1Fig. 2 is aside elevation of one-half the pulg is a shaft on which the expansibleand contractible pulley 'i is keyed. The pulley t' is constructed asfollows: Extending radially inward from the sectional rim k are arms m,slidable in guides in arms n, projecting radially outward from the hubZ. The rimarms m are provided with radial slots 0. Z represents platessecured to the hub l and fitting over the rim-arms m. p representstap-bolts extending through the slots and engaging bolt-holes in thehub-arms n. represents nuts on the ends of bolts p. By tightening thenuts they are caused to bind firmly against the rim-arms m, therebysecuring the rimarms m and hub-arms 'n together in their adjustedpositions. By loosening the nuts the rim-arms, with their rim-sections,may be moved radially inwardly from the ex panded position shown,thereby contracting the pulley.

The rim-sections and rim-arms may be moved radially by hand but tosecure nice adjustments I prefer to employ the following mechanism: u isa sleeve keyed on shaft g. Pivoted at one end to the rim-arms m and atthe other end to the sleeve u are links, each composed of the sections1^ s, screw-threaded at their inner ends and connected together by meansof a threaded sleeve t, thereby enabling the lengthof the link to bevaried. Loose on ,washer w.

the shaft g is a cap o, the sleeved portion of which is separated fromthe sleeve u by a is a collar overlapping and encircling both sleeve u,and cap o. 'y is a bolt by means of which collar w is secured to cap v.is a block or ring extending into an annular groove in sleeve u. 2 is abolt by means of which collar w is secured to ring 10. 11 is a threadedshaft secured in the end of shaft g on the line of the latters axis. 12is a handwheel keyed on the neck 13 of cap o.

By lturning the hand-wheel 12 the cap n is rotated and at the same timefed forwardly or backwardly on the threaded shaft 11 and shaft g. Thisnecessarily imparts a corresponding advancing or receding motion to thesleeve u, but without turning the same, ring 10 merely turning in itsgroove. This movement of sleeve u. through links r s t movesrim-sections outwardly or inwardly,

thereby expanding or contracting the pulley i. Prior to this operationthe nuts g of the tap-bolts are of course loosened and subsequentlytightened to hold the rim-sections and rim-arms in their adjustedpositions. In order to hold the foregoing parts stationary relatively toeach other during the operation of the machine, a nut 14 on the threadedshaft 13 is tightened against the hand-wheel 12.

Having now fully described my invention, what I claim, and desire toprotect by Letters Patent, is

1. In an expansible pulley, in combination, a shaft on which the pulleyis mounted, the pulley-hub, radially-movable rim-sections, a threadedshaft secured to the pulleyshaft, a cap on the threaded shaft, means toturn the cap relatively to the threaded shaft, thereby causing the capto move longitudinally of the threaded shaft and connections between thecap and the rim-sections.

2. In an expansible pulley, in combination, a shaft on which the pulleyis mounted, the pulley-hub, radially-movable rimsections, a sleeve onthe shaft, links connecting the sleeve and rim-sections, a threadedshaft secured to the pulley-shaft, a cap on the threaded shaft, means toturn the cap relatively to the threaded shaft, causing the cap to movelongitudinally of the threaded shaft, alnd connections between the capand the s eeve.

IOO

tions, a grooved sleeve keyed on the shaft,

links connecting the sleeve and rim-sections,

'a cap on the shaft, a block in the groove, a

collar connected to the cap and block, a threaded shaft secured to thepulley-shaft and engaged by the cap and means to turn the cap relativelyto the threaded shaft, thereby causing the cap to move longitudinally ofthe shaft and threaded shaft and imparting a corresponding longitudinalmovement to the sleeve Without rotating the same.

4. In an eXpansible pulley, in combina- K tion, a hub, arms radiatingtherefrom having guides, a rim divided into sections, slotted armsradiating inwardly therefrom and slidable on the guides, a boltextending through the slot of a rim-arm and engaging the correspondinghub-arm, a nuton the bolt adapted to tighten against the rim-arm, ashaft on Which the hub is keyed, a sleeve provided With acircumferential groove and also keyed on said shaft, adjustable linksconnecting said sleeve and rim-sections, a cap on the shaft, a block inthe groove of the sleeve, a collar surrounding said sleeve and cap andconnected to said cap and block, a threaded neck on the cap, a threadedshaft on the line of the aXis of the pulley-shaft and engaging thethreaded neck of the cap, a Wheel secured to the cap-neck, and a nut onthe threaded shaft engaging said Wheel.

In testimony of Which invention I have hereunto set my hand, atPhiladelphia.I on this 20th day of November, 1905.

GEORGE S. COX.

Witnesses M. M. HAMILTON, THORNLEY B. Woon.

